20320145122 has 4 divisors (see below), whose sum is σ = 30480217686. Its totient is φ = 10160072560.

The previous prime is 20320145119. The next prime is 20320145147. The reversal of 20320145122 is 22154102302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22154102302 = 2 ⋅11077051151.

It can be written as a sum of positive squares in only one way, i.e., 15891375721 + 4428769401 = 126061^2 + 66549^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20320145093 and 20320145102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5080036279 + ... + 5080036282.

Almost surely, 2^20320145122 is an apocalyptic number.

20320145122 is a deficient number, since it is larger than the sum of its proper divisors (10160072564).

20320145122 is a wasteful number, since it uses less digits than its factorization.

20320145122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10160072563.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 20320145122 its reverse (22154102302), we get a palindrome (42474247424).

The spelling of 20320145122 in words is "twenty billion, three hundred twenty million, one hundred forty-five thousand, one hundred twenty-two".